Actually, mine (H/K AVR525) are set as follows for surround:
M80s: 40Hz--as i understand it, everythign below 40Hz is not sent to the speakers unless they're set to large
VP100: 100Hz
QS4s: 120Hz
LFE: 120Hz--so it will play all of the above, yet only up to 40Hz for the mains if set to small

Stereo:
M80s: 40Hz
Sub: 40Hz

I am the Doctor, and THIS... is my SPOON!